I gave blood today, I haven't done so in a little over a year due to the NYS laws regarding tattoo's. But anyway, I have given blood plenty of times this is the first time that I have ever gotten sick from it. I have gone for up to four hours of tattoo sessions with out a problem or a break, but today after giving blood I went over to the station for cookies and started letting loose into a garbage can. I felt so bad all day that I had to leave work early came home and slept for three hours. Its been about 12 hours now and after lots of fluids and food still feel like a train ran over me.